First of all I would like to thank all of you who answered my previous question when I had no hope of tretinoin working. Well, I guess I responded extremely fast to the treatment. After 3 weeks of tretinoin 0.1%, minocycline, and 5% BP, my face almost had no bumps (although new breakout still appeared). However, those bumps left over very purple/red hyperpigmentation that won't go away

Would tretinoin help with these patches of discoloration and how long should I expect it to work? Sorry that I sound desperate here but my job involves sales/ working with a lot of people and it sucks having these PIH :/
Thanks again!